Engine ground/ big 3 upgrade

Tiny
WILLIAMS1927
  • MEMBER
  • 2003 HYUNDAI ELANTRA
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 135,000 MILES
Trying to do a big 3 upgrade on car listed above. Already ran positive wire to alternator and grounded the battery to the strut tower bolt now I’m looking to upgrade the engine block ground and was just wondering where the locations are.
Saturday, February 9th, 2019 AT 6:31 PM

3 Replies

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

It looks like there is one coming off of the engine/trans-axle on the bottom. I have included a Technical Service Bulletin(TSB) on how to check your electrical system using a voltage drop test. Voltage drop testing is the preferred method of electrical testing for automobiles. It's fairly simple and a lot more accurate especially in finding unwanted resistance, which is what we are looking for here. To do this voltage drop testing, take your multi-meter and place it in DC voltage mode on the 20 volts setting. You will be doing this on a "live" circuit so you will need to start your vehicle. With your vehicle running, you measure the voltage between two points in the circuit, i.E. The ground strap from the engine block to the negative battery terminal. As a rule of thumb you do not want to have more than 0.1 volts in any part of the circuit, except across the circuits load, where you want all available voltage to be dropped. Any readings more than 0.1 volts and you have unwanted resistance in the part of the circuit, i.E. A corroded ground connection, frayed wire, etc. Look in the diagrams below for the TSB.

Thanks,
Alex
2CarPros
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Saturday, February 9th, 2019 AT 7:01 PM
Tiny
WILLIAMS1927
  • MEMBER
  • 9 POSTS
Would you happen to have a picture or something of the ground that your talking about? I just want to replace it with a larger gauge ground wire bolted in the same location. Just putting in an aftermarket sub Nd amp which is reason for even doing this. Let me know thanks.
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Saturday, February 9th, 2019 AT 7:24 PM
Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello again,

The last picture in the diagrams I sent last time is the only picture I can get of it. It should be the only metal strap going from the engine block/trans-axle going to the vehicle body. It should bolt on on the bottom of the engine block/trans-axle. You can follow it to the body from there.

Thanks,
Alex
2CarPros
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Saturday, February 9th, 2019 AT 7:30 PM

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